Amitav Ghosh's new novel, 'Ghost-Eye,' revisits the Sundarbans setting of his earlier work, 'The Hungry Tide,' exploring climate crisis themes. The book, which incorporates supernatural elements and characters from 'Gun Island,' builds upon Ghosh's extensive exploration of environmental catastrophes through both fiction and non-fiction, including 'The Great Derangement' and 'The Nutmeg's Curse.'